C50.9

C50.9: Malignant neoplasm of breast of unspecified site

Non-billable headerICD-10-CMunspecified

C50.9 is a non-billable header ICD-10-CM code for malignant neoplasm of breast of unspecified site. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above C50.9

A category’s note binds every code beneath it.

Written on C50: Malignant neoplasm of breast

skin of breast (C44.501, C44.511, C44.521, C44.591)

Other codes that can never be billed with C50.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

D05Carcinoma in situ of breast
C49Malignant neoplasm of other connective and soft tissue
C49.3Malignant neoplasm of connective and soft tissue of thorax

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead C50.9

2 child codes. Green means billable.

C50.91Malignant neoplasm of breast of unspecified site, female
C50.92Malignant neoplasm of breast of unspecified site, male

Other codes under C50

C50.0Malignant neoplasm of nipple and areola
C50.1Malignant neoplasm of central portion of breast
C50.2Malignant neoplasm of upper-inner quadrant of breast
C50.3Malignant neoplasm of lower-inner quadrant of breast
C50.4Malignant neoplasm of upper-outer quadrant of breast
C50.5Malignant neoplasm of lower-outer quadrant of breast
C50.6Malignant neoplasm of axillary tail of breast
C50.8Malignant neoplasm of overlapping sites of breast
C50.AMalignant inflammatory neoplasm of breast